JOURNAL 
OF THE 
ROYAL AGRICULTURAL SOCIETY 
OF ENGLAND. 
XII. — Report of Experiments on the Groivth of Barley for Tioenty 
Years in succession on the same Land. By J. B. Lawes, Esq., 
F.R.S., F.C.S.; and J. H. Gilbert, Ph.D., F.R.S., F.C.S. 
{continued from p. 162). 
Section II. — Average Annual Produce by each 
Description of Manure employed. 
In this section the object will be to consider more exclusively 
than hitherto the effects of different manures on the barley-crop ; 
to ascertain what conditions of manuring are the best adapted 
for the crop in the soil in question ; to determine in what con- 
stituent, or class of constituents, the soil soonest shows signs 
of exhaustion by its growth ; and to compare the characters of 
barley with those of wheat in these respects. To this end atten- 
tion will chiefly be confined to the average results obtained by 
each manure over a series of years, so as to exclude, as far as 
possible, the influence of variations of season, the full considera- 
tion of which already has so clearly indicated, and so greatly 
limited, the necessary reference to it here. 
With regard to the soil, as already stated, the experimental 
barley-field immediately adjoins the experimental wheat-field. 
The soil of both may be described as — " a somewhat heavy loam, 
with a subsoil of raw yellowish red clay, but resting in its turn 
upon chalk, which provides good natural drainage." Lastly, the 
wheat-field is artificially pipe-drained, but the barley-fieldis not. 
The particulars of the manuring, and of the average annual 
produce, and increase, by manure, on each plot, over the twenty 
years, are given at one view in the folding Table (XXIV.) facing 
the next page. The full details will be found in the Appendix 
Tables (pp. 163-185) ; and such abstracts as may be needed for 
the illustration of individual points will be given as we proceed. 
VOL. IX. — s. s. U 
